from flask import Flask, render_template, session, redirect, url_for, flash
from flask_bootstrap import Bootstrap
from datetime import datetime
from flask_moment import Moment
from flask_wtf import FlaskForm
from wtforms import StringField, SubmitField
from wtforms.validators import DataRequired
import os
from flask_sqlalchemy import SQLAlchemy


basedir = os.path.abspath(os.path.dirname(__file__))
app = Flask(__name__)
app.config['SECRET_KEY'] = 'GN9rwStf3v1E'
app.config['SQLALCHEMY_DATABASE_URI'] = 'sqlite:///' + \
    os.path.join(basedir, 'data.sqlite')
app.config['SQLALCHEMY_TRACK_MODIFICATIONS'] = False

db = SQLAlchemy(app)
bootstrap = Bootstrap(app)
moment = Moment(app)


class NameForm(FlaskForm):
    name = StringField('你的名字', validators=[DataRequired()])
    submit = SubmitField('Submit')


@app.errorhandler(404)
def page_not_found(e):
    return render_template('404.html'), 404


# @app.route('/')
# def index():
#     return 'hello'

@app.route('/', methods=['GET', 'POST'])
def index():
    form = NameForm()
    if form.validate_on_submit():
        user = User.query.filter_by(username=form.name.data).first()
        if user is None:
            user = User(username=form.name.data)
            db.session.add(user)
            db.session.commit()
            session['known'] = False
        else:
            session['known'] = True
            flash('看起来你换了名字！')
        session['name'] = form.name.data
        # form.name.data = ''
        # old_name = session.get('name')
        # if old_name is not None and old_name != form.name.data:
        #     flash('看起来你换了名字！')
        # session['name'] = form.name.data
        return redirect(url_for('index'))
    return render_template('index.html', current_time=datetime.utcnow(), form=form, name=session.get('name'), known=session.get('known', False))


@app.route('/user/<name>')
def user(name):
    return 'hello,{}'.format(name)


@app.route('/temp/<name>')
def user_t(name):
    return render_template('user.html', name=name)


class Role(db.Model):
    __tablename__ = 'roles'
    id = db.Column(db.Integer, primary_key=True)
    name = db.Column(db.String(64), unique=True)
    users = db.relationship('User', backref='role')

    def __repr__(self):
        return '<Role %r>' % self.name


class User(db.Model):
    __tablename__ = 'users'
    id = db.Column(db.Integer, primary_key=True)
    username = db.Column(db.String(64), unique=True, index=True)
    role_id = db.Column(db.Integer, db.ForeignKey('roles.id'))

    def __repr__(self):
        return '<User %r>' % self.username


# db.create_all()

# admin_role = Role(name='Admin')
# mod_role = Role(name='Moderator')
# user_role = Role(name='User')
# user_john = User(username='john', role=admin_role)
# user_susan = User(username='susan', role=user_role)
# user_david = User(username='david', role=user_role)
# db.session.add_all([admin_role, mod_role, user_role,
#                     user_john, user_susan, user_david])
# db.session.commit()
